JP2000169057A - Control device of hydraulic elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely and smoothly carry out rescue driving in case of shutting up a passenger in a passenger car on a control device of a hydraulic elevator furnished with a rescue driving means. SOLUTION: A control device 9 is constituted by furnishing a shutting-up state detection means (shut-up detector 12) to output a shut-up detection signal when it detects that a passenger is shut up in a passenger car, a communication means (shut-up alarm device 13 and remote control receiver 22) to transmit the shut-up detection signal to a remote monitoring device 23 to monitor an elevator driving state by remote control and to receive a rescue commanding signal transmitted by a remote control device 24 and an electric power change- over means 11 to set to supply electric power to a rescue driving means (rescue driving circuit, etc.), from an electric power source 15 for emergency when this communication means receives the rescue commanding signal. Consequently, it is possible to actuate the rescue driving means after confirming that there is no trouble of causing damage to equipment and human accident due to automatic rescue driving by investigating an elevator driving state by the remote monitoring device 23 at the time when a shut-up failure occurs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a hydraulic elevator, and more particularly, to a control mechanism for rescuing a passenger trapped in a car.

[0002]

2. Description of the Related Art Recent hydraulic elevators are generally provided with rescue operation means for automatically rescuing passengers in a car during a power failure. This rescue operation means is that when the normal power supply is cut off, power is supplied from the emergency power supply and operates to cause the elevator to perform an automatic rescue operation,
By opening the emergency solenoid valve installed between the cylinder and the oil tank, the car can be controlled and operated so that the passenger can escape by himself. That is, when the rescue operation means is operated by the power supply from the emergency power supply, the emergency solenoid valve is opened and the pressurized oil is returned from the cylinder to the oil tank. The passenger can be lowered to the stop and the passenger can be quickly rescued.

[0003] The rescue operation means of such an elevator,
Usually, it is configured to operate only at the time of a power failure of the commercial power supply. Therefore, if a passenger is trapped in the car due to a failure other than a power failure, the rescue operation means will not operate, and the passenger will remain in the car until the elevator worker arrives at the site. There was a risk of trapping time.

Therefore, conventionally, for example, Japanese Patent Application Laid-Open No. 2-38285
As disclosed in Japanese Unexamined Patent Publication, a control mechanism has been proposed which causes the automatic rescue operation to be performed even when a failure of an elevator is detected, as in the case of a power failure. Such a conventional proposal is provided with a failure detection means capable of operating the rescue operation means, and when the failure detection means detects a failure such as abnormal stop of a car, the power supply is switched to an emergency power supply to perform an automatic rescue operation. As a result, the car is lowered to the nearest floor and stopped.

[0005]

In the above-mentioned conventional proposal, the automatic rescue operation is automatically performed when a failure is detected by the failure detecting means. If the automatic rescue operation is started without confirming the state of the elevator components when the vehicle is in the event, the safety of the passengers may be impaired or the devices may be damaged. That is, when the failure detection means detects a failure and activates the rescue operation means, if the elevator guide device is displaced from the guide rail, serious equipment damage is likely to occur due to the automatic rescue operation, and If the automatic rescue operation is performed while the car door is kept open, there is a risk of causing personal injury.

The present invention has been made in view of such problems of the prior art, and has as its object to provide a hydraulic elevator capable of performing safe and smooth rescue operation when a passenger is trapped in a car. It is to provide a control device.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a hydraulic elevator control apparatus provided with rescue operation means which operates by being supplied with electric power from an emergency power supply in the event of a power failure of a commercial power supply. Transmitting the confinement detection signal to a confinement state detection means for outputting a confinement detection signal when detecting that a passenger is confined in the car, and a remote monitoring device for remotely monitoring an elevator operation state; Communication means for receiving a rescue command signal issued by a remote monitoring device; and power supply switching for setting the rescue operation means to be supplied with power from the emergency power supply when the communication means receives the rescue command signal. Means.

[0008] As described above, when it is detected that a passenger is trapped in the car, the rescue operation means is not immediately activated, but the operation status of the elevator is checked by the remote monitoring device. If the rescue driving means is operated after confirming that there is no fear of causing the passenger, the rescue of the passenger can be performed safely and smoothly.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
A description will be given based on FIG. 1 is an overall configuration diagram of the hydraulic elevator according to the present embodiment, FIG. 2 is a block diagram showing a control mechanism when a trapping failure occurs in the hydraulic elevator shown in FIG. 1, and FIG. 3 is a main part of the present embodiment. FIG.

In the hydraulic elevator shown in FIG. 1, a plunger 3 is attached to a cylinder 4 fixed to a bottom surface of a hoistway 1 so as to be able to move in and out, and a car 2 is fixed to a tip of the plunger 3. The car 2 moves up and down in the hoistway 1 as the plunger 3 moves in and out (up and down). A car door 18 is provided on the front surface of the car 2, and the car 2 can be stopped at a position facing the hall doors 19, 19a, 19b, etc. provided on the floors 17, 17a, 17b, etc. The lifting operation is controlled so that
The car 2 has a door opening / closing device 20 and a landing detection cam 2.
When the car 2 reaches the vicinity of the landing on the nearest floor, a landing position detector (landing detection relay) 25 attached to the side wall 1a of the hoistway 1 is used for landing detection. Since the cam 21 contacts and the detector 25 is switched to the ON state, the car 2 can be landed at a predetermined position.

On the other hand, an oil tank 6 is installed in the machine room 8, and an emergency solenoid valve 7 is attached to a pipe 5 connecting the oil tank 6 and the cylinder 4. A control device 9 to which the present invention is applied is installed in the machine room 8. The control device 9 includes a power failure detection device 10, a power switching device 11, a confinement detection device 12
, A confinement alerting device 13, a control switching device 14, a remote control receiving device 22, and the like, and are connected to a regular power supply 16 and an emergency power supply 15. The control device 9
And a monitoring center 27 connected by a telephone line 26,
A remote monitoring device 23 for remotely monitoring the operating state of the hydraulic elevator and a remote control device 24 for transmitting a control signal to the control device 9 are provided.

As shown in the block diagram of FIG. 2, the output terminal of the confinement detection device 12 is
The confinement alerting device 13 is connected to a remote monitoring device 23 via a telephone line 26. Further, the power failure detection device 10 is connected to a regular power supply 16, and the output terminal of the power failure detection device 10 is connected to the power switching means 1.
1 connected. Further, the power supply switching means 11 is also connected to an emergency power supply 15 and a remote control receiving device 22, and the remote control receiving device 22 is connected to a remote control device 24 via a telephone line 26.

As shown in FIG. 3, the remote control receiving device 22 includes a remote control receiving circuit 30 and a landing detection contact 25.
a (contact of the landing detection relay 25) and a rescue operation relay 28 are provided. Further, a rescue operation circuit 29 is provided in the control device 9 in which the remote control receiver 22 and the like are incorporated, and the rescue operation circuit 29 is connected to the emergency power supply 15 via the contacts B1 and B2. ing. Further, the control device 9 includes the switch FFB and the contact A
1, A2, and A3, are connected to the respective phase terminals of the service power supply 16, and between the connection point of the switch FFB and the contact A2 and the connection point of the switch FFB and the contact A3, the rescue operation relay 28 And the relay A are connected in series, and between the contact point of the contact A2 and the control device 9 and the connection point of the contact A3 and the control device 9
Relay B is connected. A1 to A3 are contacts of the relay A, and B1 and B2 are contacts of the relay B.

In this embodiment, the rescue operation circuit 29, the emergency solenoid valve 7, and the pipe 5 constitute a main part of the rescue operation means, and the relay A and its contact A1
A3, contact 28a, relay B and its contact B1,
B2 constitutes a main part of the power supply switching means 11, and is configured such that the landing detection contact 25a cancels the power supply switching operation. The control device 9 is provided with communication means including the confinement alerting device 13 and the remote control receiving device 22.

Next, the operation of the present embodiment will be described. In a normal state where the rescue command signal is not transmitted from the remote control device 24, the rescue operation relay 28 is in the off state, so that the contact 28a is closed. Therefore, the relay A is kept on. Therefore, contact A of relay A
1 to A3 are closed, and the control device 9 has a switch FF
Each phase power of the service power supply 16 is supplied via B and the contacts A1 to A3, and the hydraulic elevator is in a normal operation state.

In the normal operation, when a confinement failure occurs in which the car 2 stops between floors, the confinement detecting device 12 of the control device 9 detects that the passenger has been confined in the car 2. Then, a confinement detection signal is issued from the confinement notifying device 13, and the confinement detection signal is notified to the remote monitoring device 23 via the telephone line 26. When the remote monitoring device 23 receives the confinement detection signal, the elevator worker waiting at the monitoring center 27 checks the operating state of the hydraulic elevator that has been notified by the remote monitoring device 23, and starts the automatic rescue operation. After confirming that there is no fear of causing equipment damage or personal injury, a rescue command signal is transmitted to the control device 9. Since the rescue command signal is transmitted from the remote control device 24 of the monitoring center 27 to the remote control receiving device 22 via the telephone line 26, the hydraulic elevator starts the automatic rescue operation in the following procedure.

That is, when a confinement failure occurs,
Since the car 2 is located between the floors and not at the position where the door can be opened and closed, the landing position detector (landing detection relay) 25 is in the off state, and the contact 25a is closed. for that reason,
When the remote control receiving device 22 receives the rescue command signal issued from the remote control device 24, the rescue operation relay 28 is switched on and its contact 28a is opened, so that the relay A is switched off. Contacts A1 to A
3 is released. As a result, each phase power of the service power supply 16 supplied to the control device 9 is cut off, but at the same time, the relay B switches to the OFF state and the contacts B1 and B2 are closed. 9 to the rescue operation circuit 29.

Thus, the emergency power supply 1 is connected to the rescue operation circuit 29.
When the electric power is supplied from the control tank 5, the emergency solenoid valve 7 is opened by the control switching device 14, so that the pressure oil in the cylinder 4 passes through the pipe 5 due to the weight of the car 2 and the plunger 3, and the oil tank 6 and the car 2 descends in the hoistway 1. Then, when the car 2 descends to the vicinity of the landing on the nearest floor, the landing detection cam 21 contacts the landing position detector 25 and switches the detector 25 to the ON state, so that the emergency solenoid valve 7 is closed. As a result, the car 2 cannot be lowered and stops at the landing on the nearest floor, and the door opening / closing device 20 operates with the stop, so that the passengers in the car 2 can be rescued safely. For example, assuming that the car 2 is guided to the landing on the floor 17 which is the nearest floor and stopped by the opening and closing of the emergency solenoid valve 7 as shown by the dashed line in FIG. When activated, the car door 18 and the landing door 19 open automatically, so that passengers in the car 2 can safely and quickly escape to the floor 17.

In the process in which the car 2 is guided to the landing on the nearest floor and stops, the landing position detector 25 is switched on and the contact 25a is opened, so that the rescue command signal is received. The rescue operation relay 28, which has been in the ON state, is switched to the OFF state, so that the relay A is switched to the ON state, the contacts A1 to A3 are closed, and the relay B is switched to the ON state, and the contacts B1,
B2 is released. Therefore, after performing the automatic rescue operation of guiding the car 2 to the landing on the nearest floor by the emergency power supply 15, the power supply from the emergency power supply 15 to the control device 9 of the hydraulic elevator is cut off, and the control is performed. The power of each phase of the service power supply 16 is supplied to the device 9 again, and the device 9 returns to the normal operation state.

[0020]

As described above, the control device for a hydraulic elevator according to the present invention does not immediately activate the rescue operation means when detecting that a passenger is trapped in the car, but uses the remote monitoring device to operate the elevator. The operating status is checked to make sure that there is no risk of automatic rescue operation causing equipment damage or personal injury before activating the rescue operation means, so that when a confinement failure occurs, passengers can be safely and safely rescued. It has an excellent effect that it can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a hydraulic elevator according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a control mechanism when a trapping failure occurs in the hydraulic elevator shown in FIG.

FIG. 3 is a circuit diagram showing a main part of the embodiment.

[Explanation of symbols]

 2 Car 3 Plunger 4 Cylinder 5 Piping 6 Oil Tank 7 Emergency Solenoid Valve 9 Controller 11 Power Switching Means 12 Confinement Detector 13 Confinement Alarm 14 Control Switching Device 15 Emergency Power 16 Regular Power 22 Remote Control Receiver 23 Remote monitoring device 24 Remote control device 25 Landing position detector 26 Telephone line 27 Monitoring center 29 Rescue operation circuit

Continued on the front page F term (reference) 3F002 AA04 AA10 CA06 EB01 GA03 GA06 GB02 3F303 BA03 CB41 EA02 EA03 FA12 3F304 AA05 CA05 CA12 EB11 EC01 ED16 ED18

Claims (1)

[Claims] 1. A rescue operation means, which is operated by supplying power from an emergency power supply in the event of a power failure of a service power supply, and when the rescue operation means is activated, an emergency solenoid valve is opened to pressurize the cylinder to an oil tank. In the hydraulic elevator control device, in which the car is lowered to the nearest floor and stopped because oil is returned, the confinement for outputting a confinement detection signal when detecting that a passenger is confined in the car is detected. State detection means;
Communication means for transmitting the confinement detection signal to a remote monitoring device that remotely monitors an elevator operating state, and receiving a rescue command signal issued by the remote monitoring device,
A control device for a hydraulic elevator, comprising: a power supply switching means for setting the communication means to receive power from the emergency power supply when receiving the rescue command signal.